Variable names and their meanings are reported below:

Period: The election period within a session

Subject: Participants’ ID in a session

TaskPerformance: How many questions answered correctly in the Task Stage

PerformanceRank: The relative ranking of TaskPerformance among participants of an electorate

GroupingRank: The ranking used to assign participants into Group A and Group B. Notice that in the Control condition, subjects are not assigned to Group A based on their performance in power competition. Instead, they are randomly assigned a number that has nothing to do with their TaskPerformance, and the computer rank them based on the randomly generated numbers. In the Treatment condition, GroupingRank=Performance Rank

Vote: The record of individuals' vote choices. 1 means Vote for Group A, 2 means Vote for Group B, and 3 means abstention

VotingGame: The record of the voting games that subjects engaged in. 1 means Voting Game 1, 2 means Voting Game 2, and 3 means Voting Game 3

Group A: This is a binary indicator that suggests whether a participant is a member of Group A or Group B. 1 means the subject is in Group A, 0 means the subject is in Group B

Treatment: This is a binary indicator that suggests whether a participant is in the Control or Treatment condition. 1 means the subject is in the Treatment condition, 0 means the subject is in the Control condition

VotingImportance: How important is it for you to vote for a policy? This question was measured based on a scale
of 1-9, 1 being not important at all, 5 being neutral, and 9 being extremely important

EarningMorethanOthers: How important is it that you earn more than the others in this experiment? This question was measured based on a scale of 1-9, 1 being not important at all, 5 being neutral, and 9 being extremely important

Competitiveness: Competitiveness is self-reported and elicited in the post-treatment survey. Participants were asked:
Do you consider yourself a competitive person? (on a scale of 1-9. 1 being Extremely competitive and 9 being Not competitive at all)

Age: A subject’s age

Major: A subject’s major

CRTScore: Participants are asked to respond to three unincentivized cognitive reflection task (CRT, Frederick 2005) questions

Men: Participants' self-reported gender. 1 means men, 0 means women.

Experiment: The record of the experiments that subjects engaged in. 1 means Experiment I, 2 means Experiment II, and 3 means Experiment III

UniqueSessionID: Global identifier of experimental sessions 

UniquePeriodID: Global identifier of election period 

UniqueElectionPeriodID: Global identifier of elections 

UniqueElectorateID: Global identifier of electorates 

UniqueGroupIDbyElectorate: Global identifier of groups (i.e., A or B) by electorate 

UniqueSubjectID: Global identifier of subjects
